Printed Pages: 2
Paper Id: 140275
B. TECH.
--- Content provided by FirstRanker.com ---
Sub Code: RME 602
(SEM-VI) THEORY EXAMINATION 2018-19
THEORY OF MACHINES
RME602
Time: 3 Hours
--- Content provided by FirstRanker.com ---
Total Marks: 70
Note: 1. Attempt all Sections. If require any missing data; then choose suitably.
SECTION A
Attempt all questions in brief. 2 x 7 = 14
-
- Differentiate between lower pair and higher pair with an example.
- What is redundant degree of freedom of a mechanism?
- State 'Law of Gearing'.
- What are turning moment diagrams? Why are they drawn?
- Define D' Alembert's principle.
- What do you mean by primary and secondary unbalance in reciprocating engine?
- Give various classifications of transmission dynamometers.
--- Content provided by FirstRanker.com ---
--- Content provided by FirstRanker.com ---
SECTION B
Attempt any three of the following: 7 x 3 = 21
-
- Determine no. of binary links, no. of ternary links, no. of quaternary links, total no. of links, no. of loops, no. of pairs/joints and degree of freedom for the following figure 1.
--- Content provided by FirstRanker.com ---
Fig. 1 - The number of teeth on each of two equal spur gears in mesh is 40. The teeth have 20° involute profiles and the module is 6 mm. If the arc of contact is 1.75 times the circular pitch, find the addendum.
- The arms of a Porter governor are 300 mm long. The upper arms are pivoted on the axis of rotation. The lower arms are attached to a sleeve at a distance of 40 mm from the axis of rotation. The mass of the load on the sleeve is 70 kg and the mass of each ball is 10 kg. Determine the equilibrium speed when the radius of rotation of the balls is 200 mm. If the friction is equivalent to a load of 20 N at the sleeve, what will be the range of speed for this position?
- Find the relation for the coefficient of fluctuation of speed in terms of maximum fluctuation of energy and the kinetic energy of the flywheel at mean speed.
- A band brake acts on the 3/4th of the circumference of a drum of 450 mm diameter which is keyed to the shaft. The band brake provides a braking torque of 225 Nm. One end of the band is attached to the fulcrum pin of the lever and the other end to the pin 100 mm from the fulcrum. If the operating force is applied at 500 mm from the fulcrum and the coefficient of friction is 0.25, find the operating force when the drum rotates in the
- Anticlockwise direction, and
- Clockwise direction.
--- Content provided by FirstRanker.com ---
- Determine no. of binary links, no. of ternary links, no. of quaternary links, total no. of links, no. of loops, no. of pairs/joints and degree of freedom for the following figure 1.
SECTION C
Attempt any one part of the following: 7x1=7
--- Content provided by FirstRanker.com ---
-
- PQRS is a four bar chain with link PS fixed as shown in figure 2. The lengths of the links are PQ= 62.5 mm ; QR = 175 mm ; RS = 112.5 mm ; and PS = 200 mm. The crank PQ rotates at 10 rad/s clockwise. Draw the velocity and acceleration diagram when angle QPS = 60° and Q and R lie on the same side of PS. Find the angular velocity and angular acceleration of links QR and RS.
This download link is referred from the post: AKTU B-Tech Last 10 Years 2010-2020 Previous Question Papers || Dr. A.P.J. Abdul Kalam Technical University
- PQRS is a four bar chain with link PS fixed as shown in figure 2. The lengths of the links are PQ= 62.5 mm ; QR = 175 mm ; RS = 112.5 mm ; and PS = 200 mm. The crank PQ rotates at 10 rad/s clockwise. Draw the velocity and acceleration diagram when angle QPS = 60° and Q and R lie on the same side of PS. Find the angular velocity and angular acceleration of links QR and RS.
--- Content provided by FirstRanker.com ---